package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Employee;
import com.sky.entity.Setmeal;
import com.sky.enumeration.OperationType;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServicelmpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     *新增菜品和对应的口味数据
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //向菜品表插入1条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.Insert1(dish);

        //前端不能传ID，只能通过每创建好一条对应的数据库数据进行返回，因为ID是自增的
        Long Dishid = dish.getId();

        //向口味表插入n条数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null && flavors.size()>0){
            //批量插入，不用遍历
            //TODO 这个代码有点不了解 因为新增的没有传过来，所以要设置一个
            //因为菜品id是必须传过来，但是口味的菜品id是非必须的，避免前端没有传，然后导入时报错，所以这里直接设置
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(Dishid);
            });

            dishFlavorMapper.Insert2(flavors);
        }
    }

    /**
     * 分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());  //PageHelper分页查询插件，记录分页数  sql中limit的内容

        Page<DishVO> page=dishMapper.selectPage(dishPageQueryDTO);   //这里查询返回的是Employee类的对象，所以这里用这个
        long total = page.getTotal();
        List<DishVO> records=page.getResult();

        return new PageResult(total,records);
    }

    
    /**
     * 批量删除
     * @param ids
     */
    @Transactional
    public void delectDish(List<Long> ids) {
        //业务逻辑
        //1.判断当前菜品是否能够删除--是否存在起售中的菜品？
        for (Long id : ids){
            Dish dish =dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                //菜品处于1，则不能删除 ,抛出一个业务异常,将这个异常给到前端
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //2.判断当前菜品是否能够删除--是否被套餐关联了？？
        List<Long> setmealIds = setmealDishMapper.getSetmealIds(ids);
        if(setmealIds !=null && setmealIds.size()>0){
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //TODO 问题一，不太懂这样前面那些不是还是没有用吗
//        //3.删除菜品表中的菜品数据
//        for (Long id : ids) {
//            dishMapper.delectById(id);
//            //4.删除菜品关联的口味数据
//            dishMapper.dishByDishId(id);
//        }
        /**
         * 优化
         */
        dishMapper.delectByIds(ids);
        dishFlavorMapper.dishByDishIds(ids);
    }

    /**
     * 通过id查询回显，口味及其相关信息
     * @param id
     * @return
     */
    public DishVO getByIdwithFlavor(Long id) {
        //id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //id查询口味数据
        List<DishFlavor> byDishId = dishFlavorMapper.getByDishId(id);
        //封装
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(byDishId);

        return dishVO;
    }


    /**
     * 修改，包括口味
     * @param dishDTO
     */
    public void updateWithflavor(DishDTO dishDTO) {
        //修改菜品表基本信息
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);

        //删除原有口味信息,然后在重新插入
        dishFlavorMapper.delectDish(dishDTO.getId());

        //重新插入
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()>0) {
            //批量插入，不用遍历
            flavors.forEach(dishFlavor -> {
                //这里已经传了
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.Insert2(flavors);
        }
    }


    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


    /**
     * 菜品起售、停售
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status == StatusConstant.ENABLE){
            //select a.* from dish a left join setmeal_dish b on a.id = b.dish_id where b.setmeal_id = ?
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach(dish -> {
                    if(StatusConstant.DISABLE == dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
//
//        Setmeal setmeal = Setmeal.builder()
//                .id(id)
//                .status(status)
//                .build();
//        combo1Mapper.update(setmeal);
        Dish dish=Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }
}
